270 research outputs found

    DePaul Discoveries Volume 7 Cover

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    Enemies or allies: Liberalism and catholicism in Lord Acton’s thought

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    "Lord Acton is known mainly by his famous maxim that “power tends to corrupt and absolute power corrupts absolutely.” Those who are more familiar with him know that he was a great nineteenth-century historian and political thinker, a passionate lover of liberty who, unfortunately, failed to complete his long-term project—the history of liberty—and thus became the “author” of “the greatest book that was never written.”2 Specialists in Victorian England, the British Catholic press and the Catholic liberal movement of that epoch are further aware that Acton was a very pious Catholic and an ardent liberal, who spent much of his life on failed attempts to reconcile Catholicism and liberalism. Some of them are puzzled, as were Acton’s contemporaries, how a man of his enormous erudition and political wisdom could have dreamt about succeeding in such a Sisyphean task. Liberalism, after all, was a child of the Enlightenment, hostile to any religion in principle and Catholicism in particular."(...

    Rousseau and the roots of modernity

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    W artykule przeanalizowano tematykę źródeł współczesnych wojen o kulturę w myśli Jana Jakuba Rousseau. Autor wskazuje, w jaki sposób myśl osiemnastowiecznego Francuza stanowi punkt odniesienia dla współczesnych stron dyskursu na temat wojen kulturowych

    Two-headed eye-segmentation approach for biometric identification

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    Iris-based identification systems are among the most popular approaches for person identification. Such systems require good-quality segmentation modules that ideally identify the regions for different eye components. This paper introduces the new two-headed architecture, where the eye components and eyelashes are segmented using two separate decoding modules. Moreover, we investigate various training scenarios by adopting different training losses. Thanks to the two-headed approach, we were also able to examine the quality of the model with the convex prior, which enforces the convexity of the segmented shapes. We conducted an extensive evaluation of various learning scenarios on real-life conditions high-resolution near-infrared iris images

    The impact of DM on MHC class II–restricted antigen presentation can be altered by manipulation of MHC–peptide kinetic stability

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    DM edits the peptide repertoire presented by major histocompatibility complex class II molecules by professional antigen-presenting cells (APCs), favoring presentation of some peptides over others. Despite considerable research by many laboratories, there is still significant uncertainty regarding the biochemical attributes of class II–peptide complexes that govern their susceptibility to DM editing. Here, using APCs that either do or do not express DM and a set of unrelated antigens, we found that the intrinsic kinetic stability of class II–peptide complexes is tightly correlated with the effects of DM editing within APCs. Furthermore, through the use of kinetic stability variants of three independent peptides, we demonstrate that increasing or decreasing the kinetic stability of class II–peptide complexes causes a corresponding alteration in DM editing. Finally, we show that the spontaneous kinetic stability of class II complexes correlates directly with the efficiency of presentation by DM+ APCs and the immunodominance of that class II–peptide complex during an immune response. Collectively, these results suggest that the pattern of DM editing in APCs can be intentionally changed by modifying class II–peptide interactions, leading to the desired hierarchy of presentation on APCs, thereby promoting recruitment of CD4 T cells specific for the preferred peptides during an immune response

    Fixed-target serial crystallography at the Structural Biology Center

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    Serial synchrotron crystallography enables the study of protein structures under physiological temperature and reduced radiation damage by collection of data from thousands of crystals. The Structural Biology Center at Sector 19 of the Advanced Photon Source has implemented a fixed-target approach with a new 3D-printed mesh-holder optimized for sample handling. The holder immobilizes a crystal suspension or droplet emulsion on a nylon mesh, trapping and sealing a near-monolayer of crystals in its mother liquor between two thin Mylar films. Data can be rapidly collected in scan mode and analyzed in near real-time using piezoelectric linear stages assembled in an XYZ arrangement, controlled with a graphical user interface and analyzed using a high-performance computing pipeline. Here, the system was applied to two β-lactamases: a class D serine β-lactamase from Chitinophaga pinensis DSM 2588 and L1 metallo-β-lactamase from Stenotrophomonas maltophilia K279a
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